Screw gripping screw driver



Dec. 6, 1949 E. T. DAUSCH 2,490,211

SCREW GRIP'PING SCREW DRIVER I Filed Jan. 5, 1945 Juan/Wm Zowar T DPatented Dec. 6, 1949 Y r,

UNITED STATES PATENT OFFICE 2,490,211 SCREW GRIPPING SCREW DRIVER EdwardT. Daus'ch, Sparks, Nev.

Application January 5, 1945, Serial No. 571,425

2 Claims.

The present invention relates to new and useful improvements in screwdrivers, and more parf the screw driver.

A further object is to provide a tool of this character of simple andpractical construction, which is eiiicient and reliable in operation,relatively inexpensive to manufacture and otherwise well adapted for thepurposes for which the same is intended.

Other objects and advantages reside in the de tails of construction andoperation, as more fully 'hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which Figure l is a topplan View.

Figure 2 is a longitudinal sectional view taken substantially on a line2-2 of Figure 1.

Figure 3 is an enlarged fragmentary side elevational view of the screwholder at the end of the screw driver.

Figures 4, 5 and 6 are transverse sectional views taken respectively onthe lines l l, 55 and 6-i5 of Figure 2.

Referring to the drawings in detail, wherein for the purpose ofillustration I have disclosed a preferred embodiment of the invention,the numeral 5 designates the shank of the screw driver having the flatscrew-engaging blade 6 at its outer end and having a handle I suitablysecured at its inner end.

A pair of rods 8 are positioned longitudinally at opposite sides of theshank 5, the inner ends of the rods being slidably received andextending longitudinally through the handle I and inserted through adisc 9 reciprocably mounted in a chamber IE1 formed in a cap I Ithreaded on the outer end of the handle 1, the outer end of the capbeing spaced from the adjacent end of the handle to form the chamberII], as will be apparent from an inspection of Figure 2 of the drawings.push-button I3 is slidably mounted in a central aperture in the top ofthe cap I i this button having a lower reduced section I4. The rods 8have their upper ends bend inwardly at right angles to their mainbodies, and these ends are gripped intermediate the slidable disc 9 anda washer [2 which abuts the shoulder intermediate the re- 2 duced lowerend I4 and the main body I3 of the push-button. A diametrically disposedpin I5 is also positioned at the shoulder intermediate the lower reducedend I4 and the main body I3 of the push-button, where it is abutted bythe washer I2, and this pin is adapted to abut the top of the cap II tolimit upward movement of the push-button I3. 7 V

The disc .9, push button I3 and rods 8 are yieldably held in an upwardlyor outwardly disposed position by means of. a coil spring l6 mountedbetween the outer end of the handle I and the disc 9.

The lower or inner ends of the rods 8 are slidably mounted in a washeror annular member I! welded or otherwise suitably secured adjacent the.

lower end of the shank 5.

A pair of spring fingers I8 have one end secured to the lower ends ofthe rods 8 by means of pins or rivets I9 and project longitudinallyatopposite sides of the blade 6 and with their lower ends bent inwardly toform jaws Z0 and provided at their inwardly projected end portions withV- shaped notches 2| adapted for receiving the shank of a screw orsimilar fastening device 22, whereby to grip the screw under the headthereof, as indicated in Figure 2 of the drawings.

The lower end of the shank 5 of the screw driver is formed atdiametrically opposite sides with rounded knobs or lugs 23 engaging theinner surfaces of the fingers I8 whereby to separate or expand the jaws20 upon a downward movement of the rods 8 and the fingers I8, the jaws2B and sprin fingers l8 returning to their normal positions upon anupward movement of the rods 8.

Accordingly, by depressing the plunger I3, the rods 8 and fingers I8will be moved downwardly relative to the screw driver to separate thejaws 20 in order to receive the screw 22 between the jaws and uponreleasing the plunger I3, the spring IE will move the rods 8 and fingersI8 upwardly to cause a gripping engagement of the screw with the jaws20.

While I have illustrated the invention adapted for use in holding screwsor similar fastening devices, it will be apparent that the device may{also be used for gripping and applying nuts onto olts.

It is believed the details of construction and manner of use of thedevice will be readily understood from the foregoing without furtherdetailed explanation.

Having thus described the invention, what I claim is:

In a screw driver and a screw-holding at- 3 tachment therefor, the screwdriver having a handle and a screw-engaging shank projecting from oneend of the handle, and the attachment comprising a pair of rods disposedon opposite sides of and extending longitudinally of the shank, saidrods being slidable in said handle and having one end projecting beyondone end of said handle, the other end of said rods projecting beyon the.M 3 and o! the hand e a guid pl on said shank having holes through whichthe rods extend slidably, a hollow cap secured upon said one end of saidhandle and enclosing a push;

button chamber and having an opening through the end thereof, a pushbutton projecting throu h said opening, a washer fixed upon the pushbutton, inwardly-directed portions upon said one end of the rods andengaging the innermost face of said washer, a disc having a pair ofspaced holes through which said rods extend and being disposed inwardlyof and-abutting said inwardlydirected rod portions, a spring disposed insaid chamber between the disc and the handle, a pair of opposed springfingers fixed in end slots in the otherend of said rods beyond saidguide plate and being biased toward said screw-engaging shank, the freeend of said fingers being provided with screw-engaging jaws, and a pairof round knobs or lugs fixed upon both sides of said screwengaging shankin longitudinal alignment with said rods and engaging the adjacentsurfaces of said springfing ers, whereby depression of said push buttoncauses longitudinal movement of said sides of and e idpezidinglongitudinally of the 'said one end of the rods and operatively securedto said push button, spring means disposed in said chamber andoperatively connected to said one end or said handle and said pushbutton for biasing the push button into its projected position, a pairof opposed spring fingers fixed to the other end of said rods beyondsaid guide plate,

' the free end of 'said fingers being provided with screw-head-engagingjaws, and a pair of knobs fixed upon both sides of said screw-engagingshank in v e it dinal al nmen w h a d r and n agin the dja ent ur aces Qsaidsn in fing he eb e ress n Qf Sa push u q causes longitudinalmovement of said rods and said spring fingers relative to said shank anddivergence ofsaid spring fingers.

ED AR T. DAUS REFERENCES CITED The following references are of record inthe file of this patent:

UNITED STATES PATENTS Number Name Date 92,729. Kientofi July 20, 1869192,901 Curtis July 10, 18.77 1,039,751 Ingram Oct. 1, 1912 1,212,743Cowell Jan. 16, 1917 1,687,788 Pinkus Oct. 16, 192.8 1,950,644 WatsonMar. 1:3, 1934

